The headquarters of Janakpur Zone and its main city is Janakpur. Close to the Indian border, it is a historic city of Hinduism. The city was believed to be the capital city of King Janak, the father in law of Lord Rama, the son of the then king of Ayodhya, Dasharatha. The city was then called 'Mithila Nagari'. The name of this zone is related to the historic King Janak and his capital Janakpur.